context-filter-polyfill
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Readme
https://davidenke.github.io/context-filter-polyfill/
Polyfills CanvasRenderingContext2d.filter capability of adopting CSS3 filters to canvas contexts at least partially.
Successfully tested on
Add the polyfill to your page via script tag from a CDN:
<head>
<script src="https://cdn.jsdelivr.net/npm/context-filter-polyfill/dist/index.min.js"></script>
</head>
Or from npm:
npm install context-filter-polyfill
... and import it in your code:
import 'context-filter-polyfill';
url ✗blur ✔brightness ✔contrast ✔drop-shadow ✔grayscale ✔hue-rotate ✔invert ✔none ✔opacity ✔saturate ✔sepia ✔Just open the integration demo on Safari / iOS or IE11.
The polyfill is applied by the following steps:
CanvasRenderingContext2dCanvasRenderingContext2dCanvasRenderingContext2dThese patches are proxying all changes to a offscreen canvas which applies the appropriate filter polyfills everytime a drawing function is called:
clearRectdrawImagefillfillRectfillTextstrokestrokeRectstrokeTextThe contents of the offscreen canvas are applied back to the original canvas and is then resetted.
FAQs
Polyfills `CanvasRenderingContext2d.filter` capability of adopting CSS3 filters to canvas contexts at least partially.
The npm package context-filter-polyfill receives a total of 1,347 weekly downloads. As such, context-filter-polyfill popularity was classified as popular.
We found that context-filter-polyfill demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 1 open source maintainer collaborating on the project.
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